Fan



FIG. 1 is a front view of a fan showing my new design; the rear view being a mirror image thereof;

FIG. 2 is a right side view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a top view thereof; and,

FIG. 5 is a bottom view thereof. 

The ornamental design for a fan, as shown and described. 